Urgent help needed - display won't start after changing Ram

[alon123A]

Hey guys. Yesterday I was on a thread here and commenters suggested I replace ram slots. I had have 3 sticks and commenters suggested I use 2 in dual mode.
Since last night my display won't start.
Things I've tried:
1. Tried 3 different hdmi cables
2. Placed the ram sticks correctly, tried 3, 2 and 1.
3. Tried my previous graphics card which is seen here.
What do I do?

 

[Hyderz]

clear cmos pull out the motherboard battery to see if it works

 

[alon123A]

Update: I purchased new ram sticks and everything seems alright for now

 

[68Olds]

Read your motherboard manual & see which slots to use. Most newer boards say two sticks go in slots A2/B2. Your RAM in the photo above is in slots A1/B1.